| 摘要 |
PROBLEM TO BE SOLVED: To provide a foamed molding of a polypropylene resin that is improved in heat resistance as a polyolefin resin foamed body and that can widely used as an automobile trim material. SOLUTION: The foamed molding of a polypropylene resin is obtained by heating/molding foamed resin particles obtained by foaming a base material resin, a raw material, which is composed mainly of a random copolymer formed by the copolymerization of propylene and ethylene and having an ethylene content of 0.1-5.0 wt.% and which has a melting point of≥140°C. The foamed molding is characterized by the following: the value obtained by deducting the calorie of the second endothermic peak from the calorie of the first endothermic peak in the DSC curve of the foamed molding is≥8 J/g; it has a crystalline structure such as there appears, in the first DSC curve obtained by differential scanning calorimetry, an endothermic peak that does not appear in the second DSC curve and that is in the higher temperature side than the endothermic peak of the second DSC curve; and the calorie of the endothermic peak of the higher temperature side is≥4 J/g and≤40 J/g. COPYRIGHT: (C)2009,JPO&INPIT
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